Lid for test tubes



1. Lid for test tubes

1.1 is a left side view of a lid for test tubes showing my new design;

1.2 is a right side view thereof;

1.3 is an enlarged bottom view thereof;

1.4 is an enlarged front view thereof;

1.5 is an enlarged rear view thereof;

1.6 is a top perspective view thereof; and

1.7 is a top view thereof.

The dashed lines depict portions of the lid for test tubes that form no part of the claimed design. 

CLAIM The ornamental design for a lid for test tubes, as shown and described. 